Morris p



M. P. HOLMES.

Y TRUCK.

. APPLICATION FILED DEC. 12| 1918. 1,878,812.

Patented May 17, 1921.

'To all whom t may cocem MORRIS P. HOLMES, OF'CLAREMONT, NEW" HAMPSHIRE,AssIGN MACHINEnY COMrANv, A CORPORATION or IllnessACHrr'sn'r'rs.-k .f

Y TRUCK.A

Application filed December 12, 191s. seriailivo, essere( Be itknown'that I, Monms P. HOLMES, a citizen of the United States, residingrr at Claremont, in the county vof Sullivan and Statev of New Hampshire,have invented certain new and useful Improvements in Trucks, of whichthe following is a "full, clear, and exact specification.

My invention relates toV trucks, and more particularly to mining-machine trucks, the object of the present invention being to provide acounterbalanced, tilting truck of the jack-knife type, which will remainin a tiltedposition afterthe unloading of the mining'machineA but whichwill be auto'- matically returned to'fa horizontal position when `the`machine is loaded onto the truck.V AIn the accompanying drawings I haveshown for purposes of illustration one embodiment which 'my inventionmay assume in practice. f Y

In these drawings?- 'Figure 1 is aside elevation of my iini proved truckwith the mining machine thereon in loaded position.

F `ig.`2 is a side elevation of the 'truck with the mining machine inunloading or loading position.

f vReferring to the-drawings, I have there hinge 7.'

shown, for the purpose of 'illustrating the principal features of -theinvention, a fourwheel truckhaving two axles 1 and 2 sup? ported bywheels 3 and 4 mounted on atrack 5. The axles 1 and 2 are connectedthrough suitable axle boxes (not shown) with two sections `and 'Gef atruck frame, these' sections being pivotall-y" connected, `as by aThefront truck section-6, which may be termed the body, bed,l or maintruck frame, since it is the larger frame land is adapted to receive theload, extends 'in vfront ofthe front axleQ for a considerable distanceand carries at the front end a forwardly extending, reversedframe member8 which limits the swinging movement of the mai'nvtruck Y frame andserves as-a skid to facilitate the loading yof the mining machine `ontothe truck. At its rear end this main truck frame or body sect'iorn isprovided ina well knowny manner with 'transverse truck driving shaft 9and asubstantially verti-` cally disposed shaft'10,v the"latter beingdriven'fby the mining machine 11 through Specification of LettersPatent., Patenfgd suitable spur gears, 12,"13Aan`d in` turn drivingtheshaft 9 through a worm-and worm gear (not shown). Suitable means, such n'ro"siJIQLIvA Ny as a vrset screw 14, is provided for limiting themovement of the miningmachine onto thetruck so as to prevent'injury-tothe spur' gears 12, 13 V,and tol hold these gears in their propervspaced relation. This truck yfbed may, 1fy desired, be balanced aboutthe axle 2, ybut such a construction is not essentialrr` to the tiltingof this memberto permit the loading or unloading Vof ythe machine.

Y )1D the, formof my'mprovement herein shown, the truck driving meansincludes a driving member or'sprocket -15 mounted on the shaft 9, adriven member or sprocket 16 mounted onthe axle 2-and ya flexibleconnection, as a chain 17, connecting said mem-v bers or sprockets.vr"When the mining machine`-v is in' loaded position, the truck isdriven in either direction along the track by themining machine 'motorand the driv-v ing connections just described. `i

VThe rear or trailer truck section 6, 'which may be termed the* reelsection trailer,

counterbalancing section,` or smaller vtruck section, is partiallyLsupported by the axle 1 and in part by the main frame section 6thrOug-hthe hinged connection 7, and'car-Y ries near its rear end a reelsupporting inem-y ber 18and a reel `19 mounted thereon, ythe latterbeing adapted' to carry a cable 20 or a hose to supply current orcompressediair to the mining machine motor. In my improvement I haveprovided'means for ro# tating the reel or drum to pay -out'or take upthel cable as theytruck'is moved alongfthe` track, this "means 'ein 'thel,form herein dis closed comprising ,sprocketV wheels 21, 22 mounted,respectii'f'ely, ongthe reel 19 vand axle' V1, and Aa' chain 23'Vengaging these sprocket wheels.` "Obviously, through ythey constructioninst described, when the truck' Vis drivena'long the track by vtheminingmatactwith the end ofthe "frame 6 in such a it will be Areadilyunderstood that when the mining machine is being unloaded from the truckby means of the usual feed chain 25, the Weight of the mining machinewill tilt the frame 6 on the front axle as a fulcrum until the shoeV,strikes the mine floor, vvhen the machine may be run off. Duringthistilting of ythe frame 6, thereel section 6is also tilted, but the partsare preferably so proportioned that the rear end thereof will not strikethe track and thus cause breakage of the reel support or other parts ofthe truck. Attention is directed to the fact that all the drivingconnections are maintained during this tilting movement and vthat nomeans are required tokeep the driving chains from loosening and fallingoff from thesprockets. If desired, the forwardk end of the frame 6 mayproject far enough beyond the axle 2 to overbalance the rear end ofthisframe and normally retain the latter tilted. In such a constructionthe reel may be placed nearer, or over, the axle l, or if for any reasonthe counterbalancing action of the forward end of the frame 6 is toogreat, the reel may be placed between vthe axle l and the hinge 7 topartially` counterbalance this extra Weight. A

While I have stated that thus truck is of the ack-knifetype, it shouldbe noted that it differs materially from the usual jackknife trucks inthat the'break in the truck frame does not come in that part of theframe which receives the mining machine, but at the rear thereof, sothat I obtain the benefits inherent in a solid bed truck. It Will benoted from the drawing (Fig. l) that the mining machine is supportedchiefly by the front axle, the center of gravity of the machine being alittle to the rear of this axle. By this construction the reel memberconstitutes a counterbalancing member to hold the main frame 6 tiltedwhen the mining machine is unloaded and contributes but little to thesupport of the mining mach-ine yvhen theflatter is loaded. Thisconstruction may be varied by placing the axle 2 nearer the front end ofthe 'frame 6, but this construction is open to objection in that Whenthe mining machine is loaded the increased tilting movement of themachine about the axle 2 will cause the truck to move rapidly to ahorizontal position and will tend to break the-hinge and strainthe-cable support and chain.

While I vhave herein shown and described one embodiment Which myinvention may assumeinpractice, it is to be understood that this form isshown for illustrative purposes and that the invention may be modifiedand embodied in various other forms Without departing from its spirit. AY

lVhat I claim as new and desire to secure by Letters Patent is:

' l. Ina mining machine truck, a tiltable ,truck body, a Wheeled pivottherefor, said body being tiltable about the pivotto loaded or unloadingposition by a mining machine movable thereover, and trailer means havinga separate wheeled mounting engaging the body at one end thereof forsupporting that end when said body is loaded. i Y

2. In`V a mining machine truck, a tiltable truck body, a Wheeled pivottherefor, sald body being tiltableabout the pivot to loaded j thatendwhen said body is loaded. c

4. In a mining machine truck, aV tiltableA truckV body, a WheeledSupporting member therefor having a single axle, said body beingtiltable about the member to loaded or unloading position bya miningmachine movable thereover, and trailer means engaging the body adjacentone end thereof for supporting that end when said body is loaded and fornormally retaining said body in an inclined position.

5. In a miningmachine truck, a tiltable A y truck body, a Wheeled pivottherefor, said bodybeing tiltable about the pivot to loaded or unloadingposition by a mining machine movable thereover, and counterbalancingtrailer means engaging the body adjacent one end ,thereof for supportingthat end when said body is loaded and for normally retaining said bodyin an inclined position. 1 6. In a mining machine truck, a tiltabletruck body, a singlewheeled supporting member therefor, said body beingvtiltableabout the member to loaded or unloading position by a miningmachine movable thereover, and counterbalancing trailer means engagingthe body adjacent one end thereof for supporting that-end When said bodyis loaded and for normally retaining said body in an inclined position.v

v 7. In a mining machine truck, a tiltable truck body, a Wheeled pivottherefor, ,said body being tiltable yabout the pivot to loaded orunloading vposition by a mining machine movable thereover, and reelsupporting means engaging the body at one end thereof ata point beyondthe farthest movement of the mining machine in loading for supportingthat end when said body is loaded and for normally retaining said bodyin an inclined osition. i

8. In a mming `machine truck, a tiltable truck body, a single wheeledsupporting member therefor, said body being tiltable about the member toloaded or unloading position by a mining machine movable thereover, andreel supporting trailer means engaging the body adjacent one end thereoffor supporting that end when'said body is loaded and for normallyretaining said body in an inclined position.

9. In a mining machine truck, a tiltable truck unit including ya truckbed, a single wheeled supporting member therefor and truck drivingmechanism thereon, said bed being tiltable to loaded or unloading po-Sition by a mining machine movable thereover, and a wheeledcounterbalancing truck unit hingedly connected to the first named truckunit at one end thereof and comprising a wheeled frame, a reel supportedthereby, and a reel rotating means mounted thereon.

10. In a mining machine truck, a tiltable truck unit including a truckbed, a single wheeled supporting member therefor and truck drivingmechanism thereon, said bed being tiltable to loaded or unloadingposition by a mining machine movable thereover, and a wheeledcounterbalancing truck unit hingedly connected to one end of the firstnamed truck unit and comprising a tiltable frame mounted on a singlewheeled supi porting member, a reel supported by said frame, and a reelrotating means mounted thereon, said counterbalancing unit being adaptedto support one end of the bed when the latter is loaded and being alsoadapted to normally retain the bed in an unloading position.

11. In a mining machine truck, coperating single aXled truck units,onecomprising a rigid tiltable machine receiving frame and the othercomprising a supplemental trailer frame, and means operativelyconnecting the rear end of said machine receiving frame and said trailerframe.

12. In a mining machine truck, coperating single aXled truck units, onecomprising a rigid tiltable machine receiving frame and the othercomprising a supplemental trailer frame, and means for pivotallyconnecting said machine receiving frame at a point adjacent its rear endto thefront end of said trailer frame.' L

13.` In a mining machine truck, a plurality of coperating operativelyconnected single aXled truck units, one comprising a rigid tiltablemachine receiving frame f and the other comprising a supplementaltrailer frame, and means on the adjacent ends of said framescoperatingto support the rear end of said machine receiving frame whenthe latter is loaded. v j

14. In a mining machine truck, a pluraling a machine receiving frame andthe other comprising a trailer frame, a `pivotal connection between therear end vof said receiving frame and said trailer frame, and a reelcarried on said trailer frame. c

15. In a mining machine truck, a plurality of single axled truck units,one comprising a machine receiving frame and the other comprising atrailer frame, a pivotal vity of single aXled truck units, one comprisnconnection between the rear end of Said vreceiving frame and saidtrailer frame, a reel Vcarried on the rear end of said trailer frame,

and truck driving mechanism carried on the rear end of said machinereceiving frame.

16. In a mining machine truck, a plurality of single aXled truck units,one comprising a machine receiving frame and the other comprising atrailer frame, a pivotal connection between the rear end of saidreceiving frame and said trailer frame, a reel carried on the rear endof said trailer frame,

truck driving mechanism carried on the rear Y yabut in a vertical planeto limit the movement ofV said truck elements -upon thereof. j

18. In a mining machine truck, a

loading pair ofy -wheeled truck elements each having a sin-` gle axleabout whose axis it is tiltable, a rcel on one'of said elements, truckdriving means on the other thereof, a kpivotalconnection between theadjacent ends of said truck elements, `and abutment means on each ofsaid truck elements having surfaces adapted to abut in a vertical planeto cause said truck elements to come to rest, upon loading thereof, whenin alinement.

In testimony whereof I aflix si nature. Y MORRIS P. OL S.

